Electrical railway signaling system.



PATENT-ED-FEB. 13, 1906. 1 LBGTRIOAL RAILWAY SIGNALING SYSTEM.

4SHELTS*SHBET lv MILLI U. MITCHELL (5a H.

APPLICATION FILED was, 190sv No. 812,433. PATENTED FEB.13, 1906. C. MITCHELL & H. MILLINGAR. ELECTRICAL RAILWAY SIGNALING SYSTEM.

APPLICATION FILED AUG. 8, 1908.

4 SHEETS-SHEET 2.

No. 812,433. PATBNTED FEB.18, 1906.

c. MITCHELL H. MILLINGAE. I ELECTRICAL RAILWAY SIGNALING SY$TEM.

APPLICATION FILED AUG.8, 1903.'

Q SHEETS SHEET 3.

No. 812,433 PAT ENTED FEB. 13, 1906. C. MITCHELL & H. MILLINGAR. ELECTRICAL RAILWAY SIGNALING SYSTEM.

APPLICATION FILED AUG. 8, 1903.

4- SHEETS-SHEET 4.

' of an electrical signaling device which will adunrrnn )s'rArss I PATENT orsrou.

CHARLES MITCHELnAND; HARRY MILLINGAR, OF EAST shroms, ILLF NOIS, ASSIGNORS or ONE-HALF ro HARRY E: DICKINSON, or EAST s'r. LOUIS, ILLINOIS.

ELEGTFNCAL. RAILWAY SIGNALING SYSTEM- Patented Feb. 13, 1906.

To all whom) it may concern.-

Be it known that we cHARLEs MITCHELL and HARRY MILLINGAR, citizens of the United States, residin at East St. Louis, in the county of St. C air and State of Illinois, have invented certain new and useful Improvements in Electrical Railway Signaling Systems, of which the following is a specification.

Our present invention relates to improvemerits in electrical railway-signals; and the main object of our invention is the provision vise one train when another train has entered a block and which will also provide a means whereby a train is automatically stopped" without the cooperation of the engineer should he not heed the signal; We thus-reduce railway accidents to a minimum by the use of an electrical apparatus so operated as to first set an out signal semaphore at termination of each blocked section of track' to warn engineer on trains following or approaching in opposite direction that the block he is entering is occupied. In addi tion to semaphore 1s a steel spring-trip located in track arranged that when semaphore is set the trip is also set. Should the engigreer be asleep or disregard the semaphore-signal, the engine passing over the trip automatically sets emergency air-brakes, stoppin the train regardless of engineer.

We a so propose to employ our apparatus where trac switches in desired places alon the route of the railroad, and by the instafiation of this system it will be evident that all classes of collisions will be avoided.

i In the accompanying drawings, Figure 1 is a diagrammaticalview of our system used in' connection with a straightaway block of a railway system. Fig. 2 is a similar view of our system as used in connection with railroads crossing each other. Fig. 3 shows a detailed view of the semaphore, trip, switches, and third rail connected as in operation.

Fig. 4 is a detailed view of a circuit-weaken,

s cross each other and at .'open I a detailed view of a lock usedfor the air-release. Fig. 10 is a view somewhat similar to Fig. 3, showing In detail the mechanism for electri'call5 controlling the trip which is adapted to operate the air-brake system of atrain. A I

' Referring to the drawin s, and more particularly to Fig. 1 thereof, t e numerals 1 and 1 desi nate the semaphores, which are mounte res actively, at the beginning and end of the b ock. In order to operate the semaphore 1 after the train has entered the block, the pressure device or third rail 2 is thrown into operation, so as to cause acurrent'to pass through wire 3, batteries 4, wire 5, electroma net 8, wire 6, and ground 7, thus energizing the electromagnet 8 and causing the armature 10 to be thrown toward the' electromagnet, so as to operate the eccentric- 11 and cause it to assume the position shown in dotted lines, the catch or l'atch armature 9 bein adapted to engage and control the arm 22 o 'the eccentric and secure thEGCCGIItIIG in the position shown in dotted lines. As the train passes onward and before leaving the block it engages a third rail or pressure device 2 ,.which' causes a current to pass through the wire 12, batteries 13, wire 14, relay 17, Wire 15, and ground 16. This energizesthe electromagnet 17 and causes the armature lg to be operated updn so as to pull upon'the eccentric '11 and. cause semaphore 1 to assume the position shown in dotted lines, thearmature catch or latch 18 engaging the arm 22 hf'the eccentric ing the samev in locked position. As the train proceeds farther it engages a 90.

and hol ressure device similar to the device 2 or 2. eyond the semaphore, so that a circuit is' made through wire 5, electromagnet 8, wire 6*, and-ground 7, causing the electromagnet 8* to be energized so as to operate an eccentric 1,1 through the medium of the armature 10 and armature latch or catch 9, thus hold- I in the semaphore in the osition shown in fu 1 lines, indlcating that t e'block is empty.

As soon as the train is disconnected from the pressure device 2 the electromagnet 8 is deenergized, so that the semaphore can be easily operated by another train either approaching or leaving the block by energizing the electrpmagnet 17 which is in circuit with a series 3O carries the oi batteries end with the wire 15 and g ronnd to safety, while the armaturcs 17 will operate them and hold them at danger." By providing an i 16. This electromagnct 18*end armature 19, causing the some. here 1 to assume the position shown in full ines. Thus the electromognets 8 and 17' through the ermature le'vers 10 and 19Will pull the signals and 3 eccentric in the shape es shown the rod 1 connected to the seine-- phore and to the eccentric, is so-pivoted as to properly operate the semaphore, the eccentrio being so pivoted as to be easily operated Withrneans whereby one twin is notified: i

the approach of theother tr sin upon thecrossing-trcck, and consists, substantially, of the.

same-mechanism as set forth in Fig. 1 except that four sets of apparatus A, B, C, andD ere employed;

In Fig.

' tinted moreminu-tely end in. detail. the opporat-us used at one end of the block whichoom .4 f Wire'29- is connected with-the line-wire 30,

switch-ber-31,Wire

' end connects t latch-immatures 23 01" 23.

. exists-substantially, of the semaphore 20, op

emblyi-connected to the eccentric 21"., which catch 22, which is adapted to' he engaged, respectively, by either one c t-the eccentric are the two op ositely-extendmg armet'urelevers 24- en 24?. The latch armature 23 and lever-armature 24 are adapts ed to be operated in unison by means oi the electromagnet 25 Whenthe switch: 26, which is connected to'thethird. rsiil 27 by moons of the arms 28, is operated, so that the ground- 32,.bctteries 38; end wire 34,1.theelectr1c current being adapted to pass -thro1'1gh-this-c1rcuit to energize the electromagnet/.25, being grounded et34. At: this point the ciectromegnetfifi has been define-rg'ized,. so thot'the eccentric is pulled .toas sumo the posit-ion shownin dotted'lines, cons the semaphore essume the position While at the same time-theectch 2m inene gagement' with the crmetnre lctch 23 and the armature-lover at; being by the electromagnet 25.1 points-the some? hores, so that the se'signeliwwhen the' lock isclos'ed oon-be given, the-sWitch-Qfi essumesthe'positionshownin tnlll-lines, 3

switch 37*, wire ground-Wire 42s Entire-event thet-the-engineer of the epproechingtrein'doesnot linden stand the semaphore we'moiint-upon earthengine and connect with the eirwsivc e. crenh operates the ietch 3 ot the drawings we have il-lusleese. lock 80.

'opereted when. the crenk-errn 45 Connected to the e ground ZQWitihilho wins 36,. 38, battery 39; ire so; tare teries e1, wire 42, eieetromegnet .35, and";

45, connected to arod 46, which is misled. in bearings 47 and carried in its forl ie'd. o r bifurcated ends 48 a roller 49, which is ed to be contacted'by the trip 54, mounts between the tracks the proper pcsitiig. This trip consists, substantially, of e' curve plate 51, (clearly shown in Fig. (ifipivotedet 7c 52 to is. support 53, and to normeliy hold the trip, so that the curved portion 54} is above the rail 55, so as to engage the roller 49,!16'1 provide the weight or connterbelence .56 end j the pivoted eccentric 57, whichis provided '73 with a curved upper end 58 whichcontoctszfjj" the under surface of the trip; and is fnrther' "j pro'vicledwith: a coiled sprin =59, whiohiscon-- nected to thesupportfificn to the eccentric so as to normally 'hold'it'in an upright po- 8o sition. 1 I instead oft-he coii spring 59 "for retmng eccentric 573cc repose-to useenelectromagnet which is c epte'd to be operetedib eny of theverionselectrical-circuitsto w'hicii: it is-shiinted, thus causing the tripto hoop etedsimulteneously with nny etros "v ions electromsgn ets used for operetirigftii semaphores. j I ,As shown inFi 9 of thedrewings, vide upon one si e of the rod 4:6 the This.fde v'ice is adapted isfrais; said erenkerm being locked inplace meens ofthe looks or latches 61, 'which train the crank-arm in the-raised position til the-seine is released-by the engineer. This device 0 crates the eirbreke system ofthef."

train on brings this train to a full stop:

From the foteg'oi description, weenie connection with the IiLWiBgS i hG operntion of our device is readily, understood, bot brieflysteted, it is esfollows: Where thee nary block system is employed, the that "2; proaching will operate the. semaphore to indicate "to any: train. followingth train is not the proper-distance. within. block for the other trslinztoiproceedq Wh n however, it train hes-passed into the bloc end operates theopposi-tekelectrcm netsoas to sense-the semephoreto si nel se etyfT-th ti-sin weitin'g outside the o ock can noose It there shouldioe another train at 1 e ct or: end entering the block and coming in the ops; positedirection, the train within the block 1 will then operate the pressure device 2 as it approaches the semaphore 1, and thereby operates; the semaphoreso as to signed the train spprcachinathe block that there is e1 tminwwithinrthe lock. This applies more -igs fl', 3, and 10', whereas in the construcion 'shoimmin Fig, ZWhere the trcckscrosss each other the-signals cre -op-erotsd by strain. worl'r'in eit right angles to the other train, set as to lint icetje thetre-ins approaching the cross p ertienlerly to the apparatus ts shown. in

I AsshowninFig. IOpfthe drawings, when the electromagnet 35 is cner ized the electro '63' is energized. The energizing operate-the treadle 54, the details which are clearly shown in Fig. 6 of the drawings.

In order tor the electromagnets 2 5 and 63 to, be 0 erated when the trainis passin into the bloc from a, a circuit is made cm the ground 34 to the electromagnet 25, wire 34,

relay 64, batteries 33, wire 32, connection 31, switch 37, wire 36, switch 26, wire 29, and.

. conse uently the ground. The energizing of the re ay 64 completes a circuit through the wire 65, wire 66, batteries 67, wire68, wire .68, electromagnet 63, and Wire 68*. This circuit energizes the electromagnet63, which attracts the armature 57 of the seas tric 57 causing the eccentric to be pulled towardthe electroma et 63, so that its catch 69 is n gaged by t e latch 70, which is brought down at a horizontal position by the electromagnetic efiect thereon. This causes the semaphore controlled by electroma et and also the trip 54 tobe operate simultaneously, the trip being placed at danger? by this 0 eration. As the train passes on throu the block and'out at bit is'necessary that t e semaphore-should be thrown in the circuit through wire 77, wire 66, batteries 67,

wire 68, wire 7 7*, elcct'romagnet 62, and wire 74-, this curcuit energizing the electromagnet 62 which attracts the armature 57 so as to pull the eccentric 57 toward the electromagnet 62, so that its catch 69 is engaged by the electromagnetically-controlled latch 70*,

thus raising and placing the trip at f safety. If a train is approaching and enters the block at b, a similar circuit is made to energize the electromagnets 25 and 63, so as to show that the train is within the block, thiscircuit being made through the ground 34, electroe magnet 25, wire 34, electromagnet 64, batteries 33, wire 32, wire 30, switch 26, and a ground-wire 29. The energizing of the electromagnet 64 controls the circuit-controlling electromagnet 63, so that the same is energized and attracts the eccentric toward the same, so that the catch 69 is enga ed by the latch 70. As the train proceeds and passes out of the block the electromagnets 35 and 62 are energized, a circuit being made through th e ground at 43, electromagnet 35, wire 42, relay 73, ;wire 42, batteries 41 wire 40, batteries 39, whe38, switch 37, wire 36,

plete the circuit to the electromagnet 62, which controls the movement of. the eccentric 57 toward it, so that its catch 69 is engaged .ating the. electromagnet 62 and the electromagnet 35.

"From the foregoing description, taken-in connection with the drawings, it is evident that our system will protect the train within the block by allowing the train to automaticall' operate a signal and to furthermore providb it with a device which will automatically stop the'tra n if the engineer should allow his train to e pter the block.

, What we claim as new, and desire to secure by-Letters Paten, is-

1. In combination with a block of a railway system, of a signalin tsemaphore mounted at eac end of the block,

an eccentric connected to each semaphore provided with a catch, oppositely-arranged electromagnets for moving the eccentrics in opposite directions and latching the same for operating the semaphore and electrical circuits for operating said electromagnets by the train as the train enters or leaves the block.

way system, of a signalin system having a semaphore mounted at eac end of the block, an eccentric connected to each semaphore provided with a catch, oppositely-arranged electromagnets for moving the eccentrics in opposite directions and latching the same for operating the semaphore, electrical circuits for o erating said electromagnets by the train as t e train enters or, leaves the block, and an air-brake system of a train operated simultaneously with any of the electrical circuits connected with the said electromagnets.

3. In combination with a block of a railway system, of a signaling system, consisting of a semaphore mounted at each end of the block, means connected to the semaphore posite directions, and ng the same for controlling the semaphores, and electric circuits for operating said electromagnets con-i leaves the block.

4. In combination with a block of a rail -way system, of a signaling s stem..therefor,' havin a semaphore mounte at each'end of the b ock, means connected to each semaphore provided with a catch, oppositely-arranged electromagnets for operatlng the said means in opposite directions and locking the system having a 1 2. In combination with a block of a rail' electrically-operated'trip for operating the switch 26, and a ground-wire 29, the relay 73 I I in this instance being energized-so as to coinby the latch 7 0, thus simultaneously oper provided with a catch, oppositely-arranged elcctromagnets for mo'vin the means in opnected by the train as the train enters or amass same fof opemtin g; tficscmaphores, electric in testimony whemof We pwsi m circuits for 07 pera'tn 1g the electromagnets c0n-- tures in pre ame of two. Witnesses.

nected by a train as the-twin enters or leaves CHARLES MITGHEIJL. j the block, a mi an electric trip' for cpcrating HARRY MELLENGAR.

.5 the air-bmk 6 system of a train operated simul- Witnesses:

- taileouslyw ith an" of the electmc circuits c011- v HERMAN C. HAUSS, v

mated with: the said electromagnetsg I PATRICK BAYNE; 

